Feed-water heater



(No Model.)

B. L. STEWART.

FEED WATER HEATER.

No. 372,499. Patented v.1, 1887.

WITNESSES: ?f y- INVENIURi m i ndLfijlew/axt N PETERS. Pncwuum uw,Wzlshmglnn. u. c.

NITED STATE ATENT OFFICE.

ED\VARD L. S'IElVART, OF BORDENTO\VN, NEWV JERSEY.

FEED-WATER HEATER.

SFECIFIQATION forming part of Letters Patent No. 372,499, dated November1, 1887.

Serial No. 226,997. (No model.)

To all whom it may concern:

Be it k nown that I. EDWARD L. S'rnwarrr, a citizen of the UnitedStatesresidi ng at Bordentown, in the county of Burlington and State ofNew Jersey have invented certain new and useful Improvements in FeedaterHeaters; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art. to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to letters of referencemarked thereon, which form a part of this specification.

This invention is designed to provide a feedwater heater for boilers inwhich the quantity of cold water which comes in contact with thecxhauststeam is regulated according to the work to be performed by theengine, and is so distributed that it takes up the ,heat from theexhauststeam more completely and rapidly, causing thereby the rapidcondensation of the steam, and thus relieving the engine of the backpressure. The water is also fed to the boiler at a much highertemperature by the great absorption of heat, producing, in consequence,greater economy in fuel.

In the accompanying sheet of drawings, in which similarreference-letters represent like parts in each of the views, Figure 1 isa side elevation of the steam and working cylinder ofa Corliss engine towhich is attached my improved feed-water heater, which is also in sideelevation. Fig. 2 is a transverse section of Fig. 1, taken through line00. Fig. 3 is a longitudinal section ofthe water-heating chamber. Fig.4c is a longitudinal section of the perforated end of the feedwater pipeand the inclosing-eollar. Fig. 5 is a front elevation of theheating-chamber. Figs. 6, 7, and 8 are transverse sections taken throughthe concentrically-arranged feed-pipe and inclosing-collar, illustratingseveral forms of construction thereof; and Figs. 9 and 10 illustrateanother construction of said collar and two positions of the same.

In said views, A indicates the cylinder of the engine, that shown in thedrawings for the purposes of illustration being a portion of a Corlissengine. 7

a is the exhaust-pipe leading from said cylinder.

B and B are respectively the upper and lower compartments of thefeed-water heatingchambcr.

b is the cold-water feed pipe leading into the upper chamber, B, of theheater, and O is a pipe leading from the lower compartment, B, to thepump 1), and thence to the boiler through which the hot feed-water isconducted to the boiler. A pipe, at, leads from the exhaustpipe a to thecompartment 13, and conducts the exhaust-steam into the same.

On or around the perforated end of the cold- Water feed-pipe is arrangeda collar, (1, which in the views is so arranged as to rotate around theperforated end of the fecd-pipe I), which is rigidly secured in thewalls of the chamber, and is provided with a plug, b, which prevents theescape of the feed-water through the end of said pipe, as indicated inFig. 4. The portion of the feed-water pipe that extends through thecompartment B is provided with two or more rows of perforations, D whichmay be formed therein, as indicated in Figs. 6, 7, and 8, or in anysuitable manner to produce the desired result. The arrangement shown inthe last-named figure is considered advantageous, inasmuch as the wateris ill row n upward and outward against the curved sides 0 of the uppercompartment and flows down the same into the lower compartment, 13. Asthe water is forced or drawn through the perforations in the feedpipc,itis subdivided,and, if the perforations are made small enough, issprayed, so that it absorbs the heat from the exhaust-steam andcondenses the same much more rapidly than would result if the steam camein contact directly with the entire volume of cold water in the pipe.The water is still further broken by striking the curved sides of theupper compartment, the arrows in Fig. at indicating the direction takenby the water as it passes from the feed-pipe into the chambers B and Band pipe 0.

Perforations d, as indicated in Figs. 3, 4, 6, 7, and 8, are provided inthe rotating collar (1, corresponding in number, size, and arrangementto the perforations in the feed-pipe I), and so long as saidperforations d are turned away from the openings in the feedpipe, asshown in Fig. 7, the escape of the water is prevented; but when thecollar is turned so as to bring the perforations in a line the waterpasses freely into the chambers or compartments. The quantity of theoutflowing water may be regulated byso turning the collar that only asmall portion of the openings cl are in a line with the perforations inthe pipe b, as will be understood. a

On the end of the'collar is a dial, (Z and behind said dial is anangular portion, d by means of which the collar may be turned in eitherdirection by a wrench; or said collar may be provided with an armprojecting therefrom, which may be grasped by the hand in turning thecollar. The indicator 1) is immovably attached to the block b or the endof the pipe I), and the dial turns around the indicator. If desirable,the dial may be formed on or rigidly secured to the heating-chamber andthe indicator turn with the rotating collar.

On the dial are indicating-marks d, which indicate the distancenecessary to turn the collar to regulate the flow of the water.

In Figs. 9 and 10 is illustrated a constrnction ofthe regulating-collarin which a certain number of the perforations are uncovered at the sametime at regular intervals along the feed-pipe, while the remainder ofsaid perforations are covered. By turning the collar a certain distanceanother series of perforations are uncovered, thus increasing the flowof the water, and by turning the said collar :1. third time the restoftheperforations are uncovered, thus permitting the escape ofwater tothe full capacity ofthe pipe. Thisis attained by forming in the collargroups ofelongated openings or slots (1 of varying lengths, so arrangedthat every third perforation is uncovered simultaneously along the pipe,or, when the groups consist of two slots of different lengths, everyalternate perforation is uncovered at the same time.

As will be evident, the number of slots in groups may be of any numberaccording to the quantity of water desired. v

As indicated in Figs. 2 and 3, the pipe 0 projects up into thecompartment B, to prevent all of the water from escaping therefrom,whereby a body of water is retained in the bottom ofthe lowercompartment and the condensation of the steam and the heating of thewater are accelerated.

WVhile a longitudinallymoving collar might be used instead of therotating collar, still the latter is considered preferable.

Having thus described my invention, what I claim is 1. In afeed-water-heating apparatus, a heating or condensing chamber consistingof up per and lower compartments, B and 13, connected by a narrowopening, as set forth, the

narrow opening connecting said upper and lower compartments, apipeopening into theinterior of said upper compartment and adapted to beconnected with the exhaust of an engine, a feed-water pipe extendinginto said upper compartment and provided with a series of perforationstherein to divide the water-column, and a pipe opening into the lowercompartment of said chamber to conduct the water therein to the boiler,for the purposes set forth.

3. In a feed-water heater, the combination, with a water and steamchamber, of a feedpipe extending into said chamber and provided with aseries of perforations therein, a rotating collar arranged around theperforated end of said pipe and provided with a series of openingstherein, which, when said collar is turned, permits the escape of thewater therethrough into the chamber, andmeans for indicating therelation of said openings to the perforations in the feed-pipe, for thepurposes set forth.

4. In a feed-water heater, the combination, with a water and steamchamber, of a feed pipe extending into said chamber and provided witha'series of perforations therein, a rotating collar arranged around theperforated end of said fecdpipe and provided with I a series ofperforations or openings therein, which, when said collar is turned,permits the escape of the water therethrough into the chamber, a pointersecured to the end of said feed-pipe outside ofthe steanrcliamber, andan indicating dial or plate secured to and turning with said rotatingcollar adjacent to said pointer and provided with marks thereon, for thepurposes set forth.

5. In a feed-water heater, the combination, with the feed-pipe having aperforated end, of an inclosing-collar having a series of graduatedgroups of openings or elongated slots therein, for the purposes setforth.

In testimony that I claim the invention set forth above I have hereuntoset my hand this 31st day of January, 1887.

EDWARD L. STEWVARI.

' Witnesses:

FREDK. F. CAMPBELL, FREDK. O. FRAENTZEL.

